<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>开发模式</title>
    <style type="text/css">
        .btn{
            display: inline-block;
            min-width: 50px;
            height: 40px;
            padding: 10px 20px;
            border: 1px solid #eee;
            background-color: royalblue;
            color: #FFF;
            font-size: 20px;
            cursor: pointer;
        }
    </style>
</head>
<body>

</body>
</html>
